src/msw/bitmap.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        bitmap.cpp
   3 // Purpose:     wxBitmap
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "bitmap.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include <stdio.h>
  33
  34     #include "wx/list.h"
  35     #include "wx/utils.h"
  36     #include "wx/app.h"
  37     #include "wx/palette.h"
  38     #include "wx/dcmemory.h"
  39     #include "wx/bitmap.h"
  40     #include "wx/icon.h"
  41 #endif
  42
  43 #include "wx/msw/private.h"
  44 #include "wx/log.h"
  45
  46 #if !defined(__WXMICROWIN__)
  47 #include "wx/msw/dib.h"
  48 #endif
  49
  50 #include "wx/image.h"
  51 #include "wx/xpmdecod.h"
  52
  53 // missing from mingw32 header
  54 #ifndef CLR_INVALID
  55     #define CLR_INVALID ((COLORREF)-1)
  56 #endif // no CLR_INVALID
  57
  58 // ----------------------------------------------------------------------------
  59 // macros
  60 // ----------------------------------------------------------------------------
  61
  62 IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
  63 IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
  64
  65 IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject)
  66
  67 // ============================================================================
  68 // implementation
  69 // ============================================================================
  70
  71 // ----------------------------------------------------------------------------
  72 // wxBitmapRefData
  73 // ----------------------------------------------------------------------------
  74
  75 wxBitmapRefData::wxBitmapRefData()
  76 {
  77     m_quality = 0;
  78     m_selectedInto = NULL;
  79     m_numColors = 0;
  80     m_bitmapMask = NULL;
  81     m_hBitmap = (WXHBITMAP) NULL;
  82 }
  83
  84 void wxBitmapRefData::Free()
  85 {
  86     wxASSERT_MSG( !m_selectedInto,
  87                   wxT("deleting bitmap still selected into wxMemoryDC") );
  88
  89     if ( m_hBitmap)
  90     {
  91         if ( !::DeleteObject((HBITMAP)m_hBitmap) )
  92         {
  93             wxLogLastError(wxT("DeleteObject(hbitmap)"));
  94         }
  95     }
  96
  97     delete m_bitmapMask;
  98     m_bitmapMask = NULL;
  99 }
 100
 101 // ----------------------------------------------------------------------------
 102 // wxBitmap creation
 103 // ----------------------------------------------------------------------------
 104
 105 // this function should be called from all wxBitmap ctors
 106 void wxBitmap::Init()
 107 {
 108     // m_refData = NULL; done in the base class ctor
 109
 110 }
 111
 112 #ifdef __WIN32__
 113
 114 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
 115 {
 116 #ifndef __WXMICROWIN__
 117     // it may be either HICON or HCURSOR
 118     HICON hicon = (HICON)icon.GetHandle();
 119
 120     ICONINFO iconInfo;
 121     if ( !::GetIconInfo(hicon, &iconInfo) )
 122     {
 123         wxLogLastError(wxT("GetIconInfo"));
 124
 125         return FALSE;
 126     }
 127
 128     wxBitmapRefData *refData = new wxBitmapRefData;
 129     m_refData = refData;
 130
 131     int w = icon.GetWidth(),
 132         h = icon.GetHeight();
 133
 134     refData->m_width = w;
 135     refData->m_height = h;
 136     refData->m_depth = wxDisplayDepth();
 137
 138     refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
 139
 140     // the mask returned by GetIconInfo() is inversed compared to the usual
 141     // wxWin convention
 142     refData->m_bitmapMask = new wxMask((WXHBITMAP)
 143                                         wxInvertMask(iconInfo.hbmMask, w, h));
 144
 145
 146     // delete the old one now as we don't need it any more
 147     ::DeleteObject(iconInfo.hbmMask);
 148
 149 #if WXWIN_COMPATIBILITY_2
 150     refData->m_ok = TRUE;
 151 #endif // WXWIN_COMPATIBILITY_2
 152
 153     return TRUE;
 154 #else
 155     return FALSE;
 156 #endif
 157 }
 158
 159 #endif // Win32
 160
 161 bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
 162 {
 163     UnRef();
 164
 165     if ( !cursor.Ok() )
 166         return FALSE;
 167
 168 #ifdef __WIN16__
 169     wxFAIL_MSG( _T("don't know how to convert cursor to bitmap") );
 170
 171     return FALSE;
 172 #else
 173     return CopyFromIconOrCursor(cursor);
 174 #endif // Win16
 175 }
 176
 177 bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 178 {
 179     UnRef();
 180
 181     if ( !icon.Ok() )
 182         return FALSE;
 183
 184     // GetIconInfo() doesn't exist under Win16 and I don't know any other way
 185     // to create a bitmap from icon there - but using this way we won't have
 186     // the mask (FIXME)
 187 #ifdef __WIN16__
 188     int width = icon.GetWidth(),
 189         height = icon.GetHeight();
 190
 191     // copy the icon to the bitmap
 192     ScreenHDC hdcScreen;
 193     HDC hdc = ::CreateCompatibleDC(hdcScreen);
 194     HBITMAP hbitmap = ::CreateCompatibleBitmap(hdcScreen, width, height);
 195     HBITMAP hbmpOld = (HBITMAP)::SelectObject(hdc, hbitmap);
 196
 197     ::DrawIcon(hdc, 0, 0, GetHiconOf(icon));
 198
 199     ::SelectObject(hdc, hbmpOld);
 200     ::DeleteDC(hdc);
 201
 202     wxBitmapRefData *refData = new wxBitmapRefData;
 203     m_refData = refData;
 204
 205     refData->m_width = width;
 206     refData->m_height = height;
 207     refData->m_depth = wxDisplayDepth();
 208
 209     refData->m_hBitmap = (WXHBITMAP)hbitmap;
 210
 211 #if WXWIN_COMPATIBILITY_2
 212     refData->m_ok = TRUE;
 213 #endif // WXWIN_COMPATIBILITY_2
 214
 215     return TRUE;
 216 #else // Win32
 217     return CopyFromIconOrCursor(icon);
 218 #endif // Win16/Win32
 219 }
 220
 221 wxBitmap::~wxBitmap()
 222 {
 223 }
 224
 225 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 226 {
 227     Init();
 228
 229 #ifndef __WXMICROWIN__
 230     wxBitmapRefData *refData = new wxBitmapRefData;
 231     m_refData = refData;
 232
 233     refData->m_width = width;
 234     refData->m_height = height;
 235     refData->m_depth = depth;
 236     refData->m_numColors = 0;
 237     refData->m_selectedInto = NULL;
 238
 239     char *data;
 240     if ( depth == 1 )
 241     {
 242         // we assume that it is in XBM format which is not quite the same as
 243         // the format CreateBitmap() wants because the order of bytes in the
 244         // line is inversed!
 245         const size_t bytesPerLine = (width + 7) / 8;
 246         const size_t padding = bytesPerLine % 2;
 247         const size_t len = height * ( padding + bytesPerLine );
 248         data = (char *)malloc(len);
 249         const char *src = bits;
 250         char *dst = data;
 251
 252         for ( int rows = 0; rows < height; rows++ )
 253         {
 254             for ( size_t cols = 0; cols < bytesPerLine; cols++ )
 255             {
 256                 unsigned char val = *src++;
 257                 unsigned char reversed = 0;
 258
 259                 for ( int bits = 0; bits < 8; bits++)
 260                 {
 261                     reversed <<= 1;
 262                     reversed |= (val & 0x01);
 263                     val >>= 1;
 264                 }
 265                 *dst++ = reversed;
 266             }
 267
 268             if ( padding )
 269                 *dst++ = 0;
 270         }
 271     }
 272     else
 273     {
 274         // bits should already be in Windows standard format
 275         data = (char *)bits;    // const_cast is harmless
 276     }
 277
 278     HBITMAP hbmp = ::CreateBitmap(width, height, 1, depth, data);
 279     if ( !hbmp )
 280     {
 281         wxLogLastError(wxT("CreateBitmap"));
 282     }
 283
 284     if ( data != bits )
 285     {
 286         free(data);
 287     }
 288
 289     SetHBITMAP((WXHBITMAP)hbmp);
 290 #endif
 291 }
 292
 293 // Create from XPM data
 294 bool wxBitmap::CreateFromXpm(const char **data)
 295 {
 296 #if wxUSE_IMAGE && wxUSE_XPM
 297     Init();
 298
 299     wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") )
 300
 301     wxXPMDecoder decoder;
 302     wxImage img = decoder.ReadData(data);
 303     wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
 304
 305     *this = wxBitmap(img);
 306     return TRUE;
 307 #else
 308     return FALSE;
 309 #endif
 310 }
 311
 312 wxBitmap::wxBitmap(int w, int h, int d)
 313 {
 314     Init();
 315
 316     (void)Create(w, h, d);
 317 }
 318
 319 wxBitmap::wxBitmap(void *data, long type, int width, int height, int depth)
 320 {
 321     Init();
 322
 323     (void)Create(data, type, width, height, depth);
 324 }
 325
 326 wxBitmap::wxBitmap(const wxString& filename, wxBitmapType type)
 327 {
 328     Init();
 329
 330     LoadFile(filename, (int)type);
 331 }
 332
 333 bool wxBitmap::Create(int w, int h, int d)
 334 {
 335 #ifndef __WXMICROWIN__
 336     UnRef();
 337
 338     m_refData = new wxBitmapRefData;
 339
 340     GetBitmapData()->m_width = w;
 341     GetBitmapData()->m_height = h;
 342     GetBitmapData()->m_depth = d;
 343
 344     HBITMAP hbmp;
 345
 346     if ( d > 0 )
 347     {
 348         hbmp = ::CreateBitmap(w, h, 1, d, NULL);
 349         if ( !hbmp )
 350         {
 351             wxLogLastError(wxT("CreateBitmap"));
 352         }
 353     }
 354     else
 355     {
 356         ScreenHDC dc;
 357         hbmp = ::CreateCompatibleBitmap(dc, w, h);
 358         if ( !hbmp )
 359         {
 360             wxLogLastError(wxT("CreateCompatibleBitmap"));
 361         }
 362
 363         GetBitmapData()->m_depth = wxDisplayDepth();
 364     }
 365
 366     SetHBITMAP((WXHBITMAP)hbmp);
 367
 368 #if WXWIN_COMPATIBILITY_2
 369     GetBitmapData()->m_ok = hbmp != 0;
 370 #endif // WXWIN_COMPATIBILITY_2
 371     return Ok();
 372 #else
 373     return FALSE;
 374 #endif
 375 }
 376
 377 // ----------------------------------------------------------------------------
 378 // wxImage to/from conversions
 379 // ----------------------------------------------------------------------------
 380
 381 #if wxUSE_IMAGE
 382
 383 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 384 {
 385 #ifdef __WXMICROWIN__
 386     // TODO
 387     return FALSE;
 388 #else
 389     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 390
 391     m_refData = new wxBitmapRefData();
 392
 393     // sizeLimit is the MS upper limit for the DIB size
 394 #ifdef  WIN32
 395     int sizeLimit = 1024*768*3;
 396 #else
 397     int sizeLimit = 0x7fff ;
 398 #endif
 399
 400     // width and height of the device-dependent bitmap
 401     int width = image.GetWidth();
 402     int bmpHeight = image.GetHeight();
 403
 404     // calc the number of bytes per scanline and padding
 405     int bytePerLine = width*3;
 406     int sizeDWORD = sizeof( DWORD );
 407     int lineBoundary = bytePerLine % sizeDWORD;
 408     int padding = 0;
 409     if( lineBoundary > 0 )
 410     {
 411         padding = sizeDWORD - lineBoundary;
 412         bytePerLine += padding;
 413     }
 414     // calc the number of DIBs and heights of DIBs
 415     int numDIB = 1;
 416     int hRemain = 0;
 417     int height = sizeLimit/bytePerLine;
 418     if( height >= bmpHeight )
 419         height = bmpHeight;
 420     else
 421     {
 422         numDIB =  bmpHeight / height;
 423         hRemain = bmpHeight % height;
 424         if( hRemain >0 )  numDIB++;
 425     }
 426
 427     // set bitmap parameters
 428     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
 429     SetWidth( width );
 430     SetHeight( bmpHeight );
 431     if (depth == -1) depth = wxDisplayDepth();
 432     SetDepth( depth );
 433
 434     // Copy the palette from the source image
 435     SetPalette(image.GetPalette());
 436
 437     // create a DIB header
 438     int headersize = sizeof(BITMAPINFOHEADER);
 439     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 440     wxCHECK_MSG( lpDIBh, FALSE, wxT("could not allocate memory for DIB header") );
 441     // Fill in the DIB header
 442     lpDIBh->bmiHeader.biSize = headersize;
 443     lpDIBh->bmiHeader.biWidth = (DWORD)width;
 444     lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 445     lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 446     //   the general formula for biSizeImage:
 447     //      ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
 448     lpDIBh->bmiHeader.biPlanes = 1;
 449     lpDIBh->bmiHeader.biBitCount = 24;
 450     lpDIBh->bmiHeader.biCompression = BI_RGB;
 451     lpDIBh->bmiHeader.biClrUsed = 0;
 452     // These seem not really needed for our purpose here.
 453     lpDIBh->bmiHeader.biClrImportant = 0;
 454     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 455     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 456     // memory for DIB data
 457     unsigned char *lpBits;
 458     lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
 459     if( !lpBits )
 460     {
 461         wxFAIL_MSG( wxT("could not allocate memory for DIB") );
 462         free( lpDIBh );
 463         return FALSE;
 464     }
 465
 466     // create and set the device-dependent bitmap
 467     HDC hdc = ::GetDC(NULL);
 468     HDC memdc = ::CreateCompatibleDC( hdc );
 469     HBITMAP hbitmap;
 470     hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
 471     ::SelectObject( memdc, hbitmap);
 472
 473 #if wxUSE_PALETTE
 474     HPALETTE hOldPalette = 0;
 475     if (image.GetPalette().Ok())
 476     {
 477         hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
 478         ::RealizePalette(memdc);
 479     }
 480 #endif // wxUSE_PALETTE
 481
 482     // copy image data into DIB data and then into DDB (in a loop)
 483     unsigned char *data = image.GetData();
 484     int i, j, n;
 485     int origin = 0;
 486     unsigned char *ptdata = data;
 487     unsigned char *ptbits;
 488
 489     for( n=0; n<numDIB; n++ )
 490     {
 491         if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
 492         {
 493             // redefine height and size of the (possibly) last smaller DIB
 494             // memory is not reallocated
 495             height = hRemain;
 496             lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 497             lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 498         }
 499         ptbits = lpBits;
 500
 501         for( j=0; j<height; j++ )
 502         {
 503             for( i=0; i<width; i++ )
 504             {
 505                 *(ptbits++) = *(ptdata+2);
 506                 *(ptbits++) = *(ptdata+1);
 507                 *(ptbits++) = *(ptdata  );
 508                 ptdata += 3;
 509             }
 510             for( i=0; i< padding; i++ )   *(ptbits++) = 0;
 511         }
 512         ::StretchDIBits( memdc, 0, origin, width, height,\
 513             0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 514         origin += height;
 515         // if numDIB = 1,  lines below can also be used
 516         //    hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
 517         // The above line is equivalent to the following two lines.
 518         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 519         //    ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
 520         // or the following lines
 521         //    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
 522         //    HDC memdc = ::CreateCompatibleDC( hdc );
 523         //    ::SelectObject( memdc, hbitmap);
 524         //    ::SetDIBitsToDevice( memdc, 0, 0, width, height,
 525         //            0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
 526         //    ::SelectObject( memdc, 0 );
 527         //    ::DeleteDC( memdc );
 528     }
 529     SetHBITMAP( (WXHBITMAP) hbitmap );
 530
 531 #if wxUSE_PALETTE
 532     if (hOldPalette)
 533         SelectPalette(memdc, hOldPalette, FALSE);
 534 #endif // wxUSE_PALETTE
 535
 536     // similarly, created an mono-bitmap for the possible mask
 537     if( image.HasMask() )
 538     {
 539         hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
 540         HGDIOBJ hbmpOld = ::SelectObject( memdc, hbitmap);
 541         if( numDIB == 1 )   height = bmpHeight;
 542         else                height = sizeLimit/bytePerLine;
 543         lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 544         lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 545         origin = 0;
 546         unsigned char r = image.GetMaskRed();
 547         unsigned char g = image.GetMaskGreen();
 548         unsigned char b = image.GetMaskBlue();
 549         unsigned char zero = 0, one = 255;
 550         ptdata = data;
 551         for( n=0; n<numDIB; n++ )
 552         {
 553             if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
 554             {
 555                 // redefine height and size of the (possibly) last smaller DIB
 556                 // memory is not reallocated
 557                 height = hRemain;
 558                 lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
 559                 lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
 560             }
 561             ptbits = lpBits;
 562             for( int j=0; j<height; j++ )
 563             {
 564                 for(i=0; i<width; i++ )
 565                 {
 566                     // was causing a code gen bug in cw : if( ( cr !=r) || (cg!=g) || (cb!=b) )
 567                     unsigned char cr = (*(ptdata++)) ;
 568                     unsigned char cg = (*(ptdata++)) ;
 569                     unsigned char cb = (*(ptdata++)) ;
 570
 571                     if( ( cr !=r) || (cg!=g) || (cb!=b) )
 572                     {
 573                         *(ptbits++) = one;
 574                         *(ptbits++) = one;
 575                         *(ptbits++) = one;
 576                     }
 577                     else
 578                     {
 579                         *(ptbits++) = zero;
 580                         *(ptbits++) = zero;
 581                         *(ptbits++) = zero;
 582                     }
 583                 }
 584                 for( i=0; i< padding; i++ )   *(ptbits++) = zero;
 585             }
 586             ::StretchDIBits( memdc, 0, origin, width, height,\
 587                 0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
 588             origin += height;
 589         }
 590         // create a wxMask object
 591         wxMask *mask = new wxMask();
 592         mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
 593         SetMask( mask );
 594         // It will be deleted when the wxBitmap object is deleted (as of 01/1999)
 595         /* The following can also be used but is slow to run
 596         wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
 597         wxMask *mask = new wxMask( *this, colour );
 598         SetMask( mask );
 599         */
 600
 601         ::SelectObject( memdc, hbmpOld );
 602     }
 603
 604     // free allocated resources
 605     ::DeleteDC( memdc );
 606     ::ReleaseDC(NULL, hdc);
 607     free(lpDIBh);
 608     free(lpBits);
 609
 610 #if WXWIN_COMPATIBILITY_2
 611     // check the wxBitmap object
 612     GetBitmapData()->SetOk();
 613 #endif // WXWIN_COMPATIBILITY_2
 614
 615     return TRUE;
 616 #endif
 617 }
 618
 619 wxImage wxBitmap::ConvertToImage() const
 620 {
 621 #ifdef __WXMICROWIN__
 622     // TODO
 623     return wxImage();
 624 #else
 625     wxImage image;
 626
 627     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
 628
 629     // create an wxImage object
 630     int width = GetWidth();
 631     int height = GetHeight();
 632     image.Create( width, height );
 633     unsigned char *data = image.GetData();
 634     if( !data )
 635     {
 636         wxFAIL_MSG( wxT("could not allocate data for image") );
 637         return wxNullImage;
 638     }
 639
 640     // calc the number of bytes per scanline and padding in the DIB
 641     int bytePerLine = width*3;
 642     int sizeDWORD = sizeof( DWORD );
 643     int lineBoundary =  bytePerLine % sizeDWORD;
 644     int padding = 0;
 645     if( lineBoundary > 0 )
 646     {
 647         padding = sizeDWORD - lineBoundary;
 648         bytePerLine += padding;
 649     }
 650
 651     // create a DIB header
 652     int headersize = sizeof(BITMAPINFOHEADER);
 653     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
 654     if( !lpDIBh )
 655     {
 656         wxFAIL_MSG( wxT("could not allocate data for DIB header") );
 657         free( data );
 658         return wxNullImage;
 659     }
 660     // Fill in the DIB header
 661     lpDIBh->bmiHeader.biSize = headersize;
 662     lpDIBh->bmiHeader.biWidth = width;
 663     lpDIBh->bmiHeader.biHeight = -height;
 664     lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
 665     lpDIBh->bmiHeader.biPlanes = 1;
 666     lpDIBh->bmiHeader.biBitCount = 24;
 667     lpDIBh->bmiHeader.biCompression = BI_RGB;
 668     lpDIBh->bmiHeader.biClrUsed = 0;
 669     // These seem not really needed for our purpose here.
 670     lpDIBh->bmiHeader.biClrImportant = 0;
 671     lpDIBh->bmiHeader.biXPelsPerMeter = 0;
 672     lpDIBh->bmiHeader.biYPelsPerMeter = 0;
 673     // memory for DIB data
 674     unsigned char *lpBits;
 675     lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
 676     if( !lpBits )
 677     {
 678         wxFAIL_MSG( wxT("could not allocate data for DIB") );
 679         free( data );
 680         free( lpDIBh );
 681         return wxNullImage;
 682     }
 683
 684     // copy data from the device-dependent bitmap to the DIB
 685     HDC hdc = ::GetDC(NULL);
 686     HBITMAP hbitmap;
 687     hbitmap = (HBITMAP) GetHBITMAP();
 688     ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 689
 690     // copy DIB data into the wxImage object
 691     int i, j;
 692     unsigned char *ptdata = data;
 693     unsigned char *ptbits = lpBits;
 694     for( i=0; i<height; i++ )
 695     {
 696         for( j=0; j<width; j++ )
 697         {
 698             *(ptdata++) = *(ptbits+2);
 699             *(ptdata++) = *(ptbits+1);
 700             *(ptdata++) = *(ptbits  );
 701             ptbits += 3;
 702         }
 703         ptbits += padding;
 704     }
 705
 706     // similarly, set data according to the possible mask bitmap
 707     if( GetMask() && GetMask()->GetMaskBitmap() )
 708     {
 709         hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
 710         // memory DC created, color set, data copied, and memory DC deleted
 711         HDC memdc = ::CreateCompatibleDC( hdc );
 712         ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
 713         ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
 714         ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
 715         ::DeleteDC( memdc );
 716         // background color set to RGB(16,16,16) in consistent with wxGTK
 717         unsigned char r=16, g=16, b=16;
 718         ptdata = data;
 719         ptbits = lpBits;
 720         for( i=0; i<height; i++ )
 721         {
 722             for( j=0; j<width; j++ )
 723             {
 724                 if( *ptbits != 0 )
 725                     ptdata += 3;
 726                 else
 727                 {
 728                     *(ptdata++)  = r;
 729                     *(ptdata++)  = g;
 730                     *(ptdata++)  = b;
 731                 }
 732                 ptbits += 3;
 733             }
 734             ptbits += padding;
 735         }
 736         image.SetMaskColour( r, g, b );
 737         image.SetMask( TRUE );
 738     }
 739     else
 740     {
 741         image.SetMask( FALSE );
 742     }
 743     // free allocated resources
 744     ::ReleaseDC(NULL, hdc);
 745     free(lpDIBh);
 746     free(lpBits);
 747
 748     return image;
 749 #endif
 750 }
 751
 752 #endif // wxUSE_IMAGE
 753
 754 bool wxBitmap::LoadFile(const wxString& filename, long type)
 755 {
 756     UnRef();
 757
 758     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 759
 760     if ( handler )
 761     {
 762         m_refData = new wxBitmapRefData;
 763
 764         return handler->LoadFile(this, filename, type, -1, -1);
 765     }
 766 #if wxUSE_IMAGE
 767     else
 768     {
 769         wxImage image;
 770         if ( image.LoadFile( filename, type ) && image.Ok() )
 771         {
 772             *this = image.ConvertToBitmap();
 773
 774             return TRUE;
 775         }
 776     }
 777 #endif // wxUSE_IMAGE
 778
 779     return FALSE;
 780 }
 781
 782 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
 783 {
 784     UnRef();
 785
 786     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 787
 788     if ( !handler )
 789     {
 790         wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %d defined."), type);
 791
 792         return FALSE;
 793     }
 794
 795     m_refData = new wxBitmapRefData;
 796
 797     return handler->Create(this, data, type, width, height, depth);
 798 }
 799
 800 bool wxBitmap::SaveFile(const wxString& filename,
 801                         int type,
 802                         const wxPalette *palette)
 803 {
 804     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 805
 806     if ( handler )
 807     {
 808         return handler->SaveFile(this, filename, type, palette);
 809     }
 810 #if wxUSE_IMAGE
 811     else
 812     {
 813         // FIXME what about palette? shouldn't we use it?
 814         wxImage image( *this );
 815         if ( image.Ok() )
 816         {
 817             return image.SaveFile(filename, type);
 818         }
 819     }
 820 #endif // wxUSE_IMAGE
 821
 822     return FALSE;
 823 }
 824
 825 // ----------------------------------------------------------------------------
 826 // sub bitmap extraction
 827 // ----------------------------------------------------------------------------
 828
 829 wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
 830 {
 831 #ifndef __WXMICROWIN__
 832     wxCHECK_MSG( Ok() &&
 833                  (rect.x >= 0) && (rect.y >= 0) &&
 834                  (rect.x+rect.width <= GetWidth()) &&
 835                  (rect.y+rect.height <= GetHeight()),
 836                  wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
 837
 838     wxBitmap ret( rect.width, rect.height, GetDepth() );
 839     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 840
 841     // copy bitmap data
 842     HDC dcSrc = ::CreateCompatibleDC(NULL);
 843     HDC dcDst = ::CreateCompatibleDC(NULL);
 844     SelectObject(dcSrc, (HBITMAP) GetHBITMAP());
 845     SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP());
 846     BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 847
 848     // copy mask if there is one
 849     if (GetMask())
 850     {
 851         HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
 852
 853         SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap());
 854         SelectObject(dcDst, (HBITMAP) hbmpMask);
 855         BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
 856
 857         wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
 858         ret.SetMask(mask);
 859     }
 860
 861     SelectObject(dcDst, NULL);
 862     SelectObject(dcSrc, NULL);
 863     DeleteDC(dcDst);
 864     DeleteDC(dcSrc);
 865
 866     return ret;
 867 #else
 868     return wxBitmap();
 869 #endif
 870 }
 871
 872 // ----------------------------------------------------------------------------
 873 // wxBitmap accessors
 874 // ----------------------------------------------------------------------------
 875
 876 void wxBitmap::SetQuality(int q)
 877 {
 878     EnsureHasData();
 879
 880     GetBitmapData()->m_quality = q;
 881 }
 882
 883 #if WXWIN_COMPATIBILITY_2
 884 void wxBitmap::SetOk(bool isOk)
 885 {
 886     EnsureHasData();
 887
 888     GetBitmapData()->m_ok = isOk;
 889 }
 890 #endif // WXWIN_COMPATIBILITY_2
 891
 892 #if wxUSE_PALETTE
 893
 894 void wxBitmap::SetPalette(const wxPalette& palette)
 895 {
 896     EnsureHasData();
 897
 898     GetBitmapData()->m_bitmapPalette = palette;
 899 }
 900
 901 #endif // wxUSE_PALETTE
 902
 903 void wxBitmap::SetMask(wxMask *mask)
 904 {
 905     EnsureHasData();
 906
 907     GetBitmapData()->m_bitmapMask = mask;
 908 }
 909
 910 // Creates a bitmap that matches the device context, from
 911 // an arbitray bitmap. At present, the original bitmap must have an
 912 // associated palette. TODO: use a default palette if no palette exists.
 913 // Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
 914 wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
 915 {
 916 #ifdef __WXMICROWIN__
 917     return wxBitmap();
 918 #else
 919     wxMemoryDC      memDC;
 920     wxBitmap        tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
 921     HPALETTE        hPal = (HPALETTE) NULL;
 922     LPBITMAPINFO    lpDib;
 923     void            *lpBits = (void*) NULL;
 924
 925 #if wxUSE_PALETTE
 926     if( GetPalette() && GetPalette()->Ok() )
 927     {
 928         tmpBitmap.SetPalette(*GetPalette());
 929         memDC.SelectObject(tmpBitmap);
 930         memDC.SetPalette(*GetPalette());
 931         hPal = (HPALETTE)GetPalette()->GetHPALETTE();
 932     }
 933     else
 934     {
 935         hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
 936         wxPalette palette;
 937         palette.SetHPALETTE( (WXHPALETTE)hPal );
 938         tmpBitmap.SetPalette( palette );
 939         memDC.SelectObject(tmpBitmap);
 940         memDC.SetPalette( palette );
 941     }
 942 #else // !wxUSE_PALETTE
 943     hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
 944 #endif // wxUSE_PALETTE/!wxUSE_PALETTE
 945
 946     // set the height negative because in a DIB the order of the lines is
 947     // reversed
 948     if ( !wxCreateDIB(GetWidth(), -GetHeight(), GetDepth(), hPal, &lpDib) )
 949     {
 950         return wxNullBitmap;
 951     }
 952
 953     lpBits = malloc(lpDib->bmiHeader.biSizeImage);
 954
 955     ::GetBitmapBits(GetHbitmap(), lpDib->bmiHeader.biSizeImage, lpBits);
 956
 957     ::SetDIBitsToDevice(GetHdcOf(memDC), 0, 0,
 958                         GetWidth(), GetHeight(),
 959                         0, 0, 0, GetHeight(),
 960                         lpBits, lpDib, DIB_RGB_COLORS);
 961
 962     free(lpBits);
 963
 964     wxFreeDIB(lpDib);
 965
 966     return tmpBitmap;
 967 #endif
 968 }
 969
 970 // ----------------------------------------------------------------------------
 971 // wxMask
 972 // ----------------------------------------------------------------------------
 973
 974 wxMask::wxMask()
 975 {
 976     m_maskBitmap = 0;
 977 }
 978
 979 // Construct a mask from a bitmap and a colour indicating
 980 // the transparent area
 981 wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
 982 {
 983     m_maskBitmap = 0;
 984     Create(bitmap, colour);
 985 }
 986
 987 // Construct a mask from a bitmap and a palette index indicating
 988 // the transparent area
 989 wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
 990 {
 991     m_maskBitmap = 0;
 992     Create(bitmap, paletteIndex);
 993 }
 994
 995 // Construct a mask from a mono bitmap (copies the bitmap).
 996 wxMask::wxMask(const wxBitmap& bitmap)
 997 {
 998     m_maskBitmap = 0;
 999     Create(bitmap);
1000 }
1001
1002 wxMask::~wxMask()
1003 {
1004     if ( m_maskBitmap )
1005         ::DeleteObject((HBITMAP) m_maskBitmap);
1006 }
1007
1008 // Create a mask from a mono bitmap (copies the bitmap).
1009 bool wxMask::Create(const wxBitmap& bitmap)
1010 {
1011 #ifndef __WXMICROWIN__
1012     wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
1013                  _T("can't create mask from invalid or not monochrome bitmap") );
1014
1015     if ( m_maskBitmap )
1016     {
1017         ::DeleteObject((HBITMAP) m_maskBitmap);
1018         m_maskBitmap = 0;
1019     }
1020
1021     m_maskBitmap = (WXHBITMAP) CreateBitmap(
1022                                             bitmap.GetWidth(),
1023                                             bitmap.GetHeight(),
1024                                             1, 1, 0
1025                                            );
1026     HDC srcDC = CreateCompatibleDC(0);
1027     SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
1028     HDC destDC = CreateCompatibleDC(0);
1029     SelectObject(destDC, (HBITMAP) m_maskBitmap);
1030     BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
1031     SelectObject(srcDC, 0);
1032     DeleteDC(srcDC);
1033     SelectObject(destDC, 0);
1034     DeleteDC(destDC);
1035     return TRUE;
1036 #else
1037     return FALSE;
1038 #endif
1039 }
1040
1041 // Create a mask from a bitmap and a palette index indicating
1042 // the transparent area
1043 bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
1044 {
1045     if ( m_maskBitmap )
1046     {
1047         ::DeleteObject((HBITMAP) m_maskBitmap);
1048         m_maskBitmap = 0;
1049     }
1050
1051 #if wxUSE_PALETTE
1052     if (bitmap.Ok() && bitmap.GetPalette()->Ok())
1053     {
1054         unsigned char red, green, blue;
1055         if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
1056         {
1057             wxColour transparentColour(red, green, blue);
1058             return Create(bitmap, transparentColour);
1059         }
1060     }
1061 #endif // wxUSE_PALETTE
1062
1063     return FALSE;
1064 }
1065
1066 // Create a mask from a bitmap and a colour indicating
1067 // the transparent area
1068 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
1069 {
1070 #ifndef __WXMICROWIN__
1071     wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
1072
1073     if ( m_maskBitmap )
1074     {
1075         ::DeleteObject((HBITMAP) m_maskBitmap);
1076         m_maskBitmap = 0;
1077     }
1078
1079     int width = bitmap.GetWidth(),
1080         height = bitmap.GetHeight();
1081
1082     // scan the bitmap for the transparent colour and set the corresponding
1083     // pixels in the mask to BLACK and the rest to WHITE
1084     COLORREF maskColour = RGB(colour.Red(), colour.Green(), colour.Blue());
1085     m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
1086
1087     HDC srcDC = ::CreateCompatibleDC(NULL);
1088     HDC destDC = ::CreateCompatibleDC(NULL);
1089     if ( !srcDC || !destDC )
1090     {
1091         wxLogLastError(wxT("CreateCompatibleDC"));
1092     }
1093
1094     bool ok = TRUE;
1095
1096     // SelectObject() will fail
1097     wxASSERT_MSG( !bitmap.GetSelectedInto(),
1098                   _T("bitmap can't be selected in another DC") );
1099
1100     HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
1101     if ( !hbmpSrcOld )
1102     {
1103         wxLogLastError(wxT("SelectObject"));
1104
1105         ok = FALSE;
1106     }
1107
1108     HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
1109     if ( !hbmpDstOld )
1110     {
1111         wxLogLastError(wxT("SelectObject"));
1112
1113         ok = FALSE;
1114     }
1115
1116     // this is not very efficient, but I can't think of a better way of doing
1117     // it
1118     for ( int w = 0; ok && (w < width); w++ )
1119     {
1120         for ( int h = 0; ok && (h < height); h++ )
1121         {
1122             COLORREF col = GetPixel(srcDC, w, h);
1123             if ( col == CLR_INVALID )
1124             {
1125                 wxLogLastError(wxT("GetPixel"));
1126
1127                 // doesn't make sense to continue
1128                 ok = FALSE;
1129
1130                 break;
1131             }
1132
1133             if ( col == maskColour )
1134             {
1135                 ::SetPixel(destDC, w, h, RGB(0, 0, 0));
1136             }
1137             else
1138             {
1139                 ::SetPixel(destDC, w, h, RGB(255, 255, 255));
1140             }
1141         }
1142     }
1143
1144     ::SelectObject(srcDC, hbmpSrcOld);
1145     ::DeleteDC(srcDC);
1146     ::SelectObject(destDC, hbmpDstOld);
1147     ::DeleteDC(destDC);
1148
1149     return ok;
1150 #else
1151     return FALSE;
1152 #endif
1153 }
1154
1155 // ----------------------------------------------------------------------------
1156 // wxBitmapHandler
1157 // ----------------------------------------------------------------------------
1158
1159 bool wxBitmapHandler::Create(wxGDIImage *image,
1160                              void *data,
1161                              long flags,
1162                              int width, int height, int depth)
1163 {
1164     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1165
1166     return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
1167 }
1168
1169 bool wxBitmapHandler::Load(wxGDIImage *image,
1170                            const wxString& name,
1171                            long flags,
1172                            int width, int height)
1173 {
1174     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1175
1176     return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
1177 }
1178
1179 bool wxBitmapHandler::Save(wxGDIImage *image,
1180                            const wxString& name,
1181                            int type)
1182 {
1183     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
1184
1185     return bitmap ? SaveFile(bitmap, name, type) : FALSE;
1186 }
1187
1188 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
1189                              void *WXUNUSED(data),
1190                              long WXUNUSED(type),
1191                              int WXUNUSED(width),
1192                              int WXUNUSED(height),
1193                              int WXUNUSED(depth))
1194 {
1195     return FALSE;
1196 }
1197
1198 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
1199                                const wxString& WXUNUSED(name),
1200                                long WXUNUSED(type),
1201                                int WXUNUSED(desiredWidth),
1202                                int WXUNUSED(desiredHeight))
1203 {
1204     return FALSE;
1205 }
1206
1207 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
1208                                const wxString& WXUNUSED(name),
1209                                int WXUNUSED(type),
1210                                const wxPalette *WXUNUSED(palette))
1211 {
1212     return FALSE;
1213 }
1214
1215 // ----------------------------------------------------------------------------
1216 // DIB functions
1217 // ----------------------------------------------------------------------------
1218
1219 #ifndef __WXMICROWIN__
1220 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
1221                  HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
1222 {
1223    unsigned long   i, headerSize;
1224    LPBITMAPINFO    lpDIBheader = NULL;
1225    LPPALETTEENTRY  lpPe = NULL;
1226
1227
1228    // Allocate space for a DIB header
1229    headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
1230    lpDIBheader = (BITMAPINFO *) malloc(headerSize);
1231    lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
1232
1233    GetPaletteEntries(hPal, 0, 256, lpPe);
1234
1235    memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
1236
1237    // Fill in the static parts of the DIB header
1238    lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
1239    lpDIBheader->bmiHeader.biWidth = xSize;
1240    lpDIBheader->bmiHeader.biHeight = ySize;
1241    lpDIBheader->bmiHeader.biPlanes = 1;
1242
1243    // this value must be 1, 4, 8 or 24 so PixelDepth can only be
1244    lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
1245    lpDIBheader->bmiHeader.biCompression = BI_RGB;
1246    lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
1247    lpDIBheader->bmiHeader.biClrUsed = 256;
1248
1249
1250    // Initialize the DIB palette
1251    for (i = 0; i < 256; i++) {
1252       lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
1253       lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
1254       lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
1255       lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
1256    }
1257
1258    *lpDIBHeader = lpDIBheader;
1259
1260    return TRUE;
1261 }
1262
1263 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
1264 {
1265     free(lpDIBHeader);
1266 }
1267 #endif
1268
1269 // ----------------------------------------------------------------------------
1270 // other helper functions
1271 // ----------------------------------------------------------------------------
1272
1273 extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
1274 {
1275 #ifndef __WXMICROWIN__
1276     wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
1277
1278     // get width/height from the bitmap if not given
1279     if ( !w || !h )
1280     {
1281         BITMAP bm;
1282         ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
1283         w = bm.bmWidth;
1284         h = bm.bmHeight;
1285     }
1286
1287     HDC hdcSrc = ::CreateCompatibleDC(NULL);
1288     HDC hdcDst = ::CreateCompatibleDC(NULL);
1289     if ( !hdcSrc || !hdcDst )
1290     {
1291         wxLogLastError(wxT("CreateCompatibleDC"));
1292     }
1293
1294     HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
1295     if ( !hbmpInvMask )
1296     {
1297         wxLogLastError(wxT("CreateBitmap"));
1298     }
1299
1300     ::SelectObject(hdcSrc, hbmpMask);
1301     ::SelectObject(hdcDst, hbmpInvMask);
1302     if ( !::BitBlt(hdcDst, 0, 0, w, h,
1303                    hdcSrc, 0, 0,
1304                    NOTSRCCOPY) )
1305     {
1306         wxLogLastError(wxT("BitBlt"));
1307     }
1308
1309     ::DeleteDC(hdcSrc);
1310     ::DeleteDC(hdcDst);
1311
1312     return hbmpInvMask;
1313 #else
1314     return 0;
1315 #endif
1316 }